create android and ios application for a website

I want to develop an app for a website. This website is a charity website. What we have here is that we connect people in need and blood donors. We have a database of blood donors in each city and anyone can register with us as a donor. Anyone can search and post emergency requirements for blood donation. To extend the reach of website, we want to develop application for android as well as ios. Please be generous with your bids as this a charity work and about saving lives. We just need to pull enteries from a database and add new entries to it. Nothing too much complicated, but UI must be engaging ,easy to use for non technical people and world class design.